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What is fool's gold ?...

What is fool's gold ?

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Fool's gold is

Which of the following is fool's gold?

The fool's gold is

"Fool's gold" is:

Which mineral is also known as 'fool's gold'?

The total number of ore of Cu from the following are ……….. Atacamite, Sphalertie, Ruby copper, Chalcanthite, Fool's gold, Chalcopyrite, Angelsite, Baryte, Chalcocite, Zincite.

PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -IMPORTANT QUESTIONS FOR BOARD EXAMINATION
  1. What is a mineral? How does it differ from an ore?

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  2. Copper and silver lie below hydrogen in electrochemical series and yet...

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  3. What is fool's gold ?

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  4. What type of ores concentrated by electromagnetic separation ? Gi...

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  5. (a) Why is it that only sulphide ores are concentrated by frot...

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  6. Name a sulphide ore which is not concentrated by froth floatati...

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  7. A sample of galena is contaminated with zinc blende. Name one chemical...

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  8. What is the significance of leaching in the extraction of aluminium?

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  9. Why is it advantageous to roast a sulphide ore to the oxide before red...

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  10. Giving examples differentiate between roasting and calcination.

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  11. Suggest a condition unders which magnesium could reduce alumina.

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  12. How is cas iron different from pig iron ?

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  13. The choice of a reducing agent in a particular case depends on thermod...

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  14. The extraction of Au by leaching with NaCN both oxidation and reductio...

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  15. (a) During roasting most of the metals are converted into their ...

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  16. What is the principle of thermite process ? Name two meals which can ...

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  17. Write a non - exothermic reaction takind place in the blast fur...

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  18. Write down the reactions taking place in Blast furnace related t...

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  19. What is a slag ? Give one example.

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  20. How is copper extracted from a low grade ore of it ?

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